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In this paper, we consider a point-to-point wireless communication system. The source monitors a physical process and generates status update packets according to a Poisson process. The packets are transmitted to the destination by using…

Signal Processing · Electrical Eng. & Systems 2019-08-20 Rui Wang , Yifan Gu , He Chen , Yonghui Li , Branka Vucetic

In this letter, a reconfigurable intelligent surface (RIS)-assisted simultaneous wireless information and power transfer (SWIPT) network is investigated. To quantify the freshness of the data packets at the information receiver, the age of…

Signal Processing · Electrical Eng. & Systems 2022-10-05 Wanting Lyu , Yue Xiu , Jun Zhao , Zhongpei Zhang

In this paper, we study the problem of optimal scheduling of content placement along time in a base station with limited cache capacity, taking into account jointly the offloading effect and freshness of information. We model offloading…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-10-30 Ghafour Ahani , Di Yuan

This paper considers a cooperative status update system with a source aiming to send randomly generated status updates to a designated destination as timely as possible with the help of a relay. We adopt a recently proposed concept, Age of…

Information Theory · Computer Science 2020-01-14 Bohai Li , He Chen , Yong Zhou , Yonghui Li

Information freshness and low latency communication is important to many emerging applications. While Age of Information (AoI) serves as a metric of information freshness, packet delay is a traditional metric of communication latency. We…

Information Theory · Computer Science 2019-01-15 Rajat Talak , Eytan Modiano

In this work, we study age-optimal scheduling with stability constraints in a multiple access channel with two heterogeneous source nodes transmitting to a common destination. The first node is connected to a power grid and it has randomly…

Information Theory · Computer Science 2021-02-26 Zheng Chen , Nikolaos Pappas , Emil Björnson , Erik G. Larsson

We propose and evaluate age of information (AoI)-aware multiple access mechanisms for the Internet of Things (IoT) in multi-relay two-hop networks. The network considered comprises end devices (EDs) communicating with a set of relays in…

Signal Processing · Electrical Eng. & Systems 2025-03-21 Gabriel Martins de Jesus , Felippe Moraes Pereira , João Luiz Rebelatto , Richard Demo Souza , Onel Alcaraz López

The age of information (AoI) performance analysis is essential for evaluating the information freshness in the large-scale mobile edge computing (MEC) networks. This work proposes the earliest analysis of the mean AoI (MAoI) performance of…

Systems and Control · Electrical Eng. & Systems 2024-09-25 Ying Dong , Hang Xiao , Haonan Hu , Jiliang Zhang , Qianbin Chen , Jie Zhang

We consider a slotted-time system with a transmitter-receiver pair. In the system, a transmitter observes a dynamic source and sends updates to a remote receiver through a communication channel. We assume that the channel is error-free but…

Information Theory · Computer Science 2023-01-19 Yutao Chen , Anthony Ephremides

Data collected and transmitted by Internet of things (IoT) devices are typically used for control and monitoring purposes; and hence, their timely delivery is of utmost importance for the underlying applications. However, IoT devices…

Information Theory · Computer Science 2020-04-24 Elvina Gindullina , Leonardo Badia , Deniz Gündüz

Age of Information (AoI) has proven to be a useful metric in networked systems where timely information updates are of importance. In the literature, minimizing "average age" has received considerable attention. However, various…

Information Theory · Computer Science 2020-10-06 Jaya Prakash Champati , Hussein Al-Zubaidy , James Gross

Many emerging Internet of Things (IoT) applications rely on information collected by sensor nodes where the freshness of information is an important criterion. \textit{Age of Information} (AoI) is a metric that quantifies information…

The notion of age-of-information (AoI) is investigated in the context of large-scale wireless networks, in which transmitters need to send a sequence of information packets, which are generated as independent Bernoulli processes, to their…

Information Theory · Computer Science 2020-12-24 Howard H. Yang , Chao Xu , Xijun Wang , Daquan Feng , Tony Q. S. Quek

A status updating system is considered in which multiple data sources generate packets to be delivered to a destination through a shared energy harvesting sensor. Only one source's data, when available, can be transmitted by the sensor at a…

Information Theory · Computer Science 2021-09-16 Christopher Daniel , Ahmed Arafa

A key metric to express the timeliness of status updates in latency-sensitive networked systems is the age of information (AoI), i.e., the time elapsed since the generation of the last received informative status message. This metric allows…

Performance · Computer Science 2022-04-12 Amr Rizk , Jean-Yves Le Boudec

Age of information (AoI) is a time-evolving measure of information freshness, that tracks the time since the last received fresh update was generated. Analyzing peak and average AoI, two time average metrics of AoI, for various continuous…

Information Theory · Computer Science 2019-01-31 Vishrant Tripathi , Rajat Talak , Eytan Modiano

The freshness of status information is of great importance for time-critical Internet of Things (IoT) applications. A metric measuring status freshness is the age-of-information (AoI), which captures the time elapsed from the status being…

Networking and Internet Architecture · Computer Science 2020-03-25 Rui Li , Qian Ma , Jie Gong , Zhi Zhou , Xu Chen

The Age of Incorrect Information (AoII) is a metric that can combine the freshness of the information available to a gateway in an Internet of Things (IoT) network with the accuracy of that information. As such, minimizing the AoII can…

Information Theory · Computer Science 2023-01-27 Anupam Nayak , Anders E. Kalør , Federico Chiariotti , Petar Popovski

In this paper, we adopt the fluid limits to analyze Age of Information (AoI) in a wireless multiaccess network with many users. We consider the case wherein users have heterogeneous i.i.d. channel conditions and the statuses are…

Information Theory · Computer Science 2020-12-29 Zhiyuan Jiang

Motivated by cooperative distributed networks in which users dynamically alternate between transmit and receive modes under half-duplex constraints, this paper studies the Age of Information (AoI) in a distributed multi-user network using…

Information Theory · Computer Science 2026-04-16 Peng Zou , Ali Maatouk , Egemen Erbayat , Suresh Subramaniam